<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
   <script>
         var Vue=function () {
              this.age=10;
         }
         Vue.prototype={

         }

         Vue.getAge=function () {
              return this.age;
         }
         Vue.age=100;
         console.log(Vue.getAge())
   </script>
</body>
</html>